Hello Sonali,

Since yiu have mentioned you are an engineering aspirant, by that I am assuming that you are saying you are a JEE aspirant. Well, for JEE, it is mandatory to wrote Physics, Chemistry and Maths paper. Biology is not an essential subject to write for JEE. So, do not worry as for JEE, writing Physics, Chemistry and Maths is enough alongwith required percentage in your boards.

All the best!